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Heat and Mass Transfer

Heat and Mass Transfer
Heat is closely related with

Liquids
Energy
Temperature
Entropy

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Heat and Mass Transfer
Depending on the radiating properties, a body will be white when (Where a = absorptivity, p = reflectivity, x = transmissivity)

P = 0, x = 1 and a = 0
P = 0, x = 0 and a = 1
P=1, T = 0 and a = 0
X = 0, a + p = 1

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Heat and Mass Transfer
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as

Forced convection
Free convection
Radiation
Conduction

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Heat and Mass Transfer
In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by

Sq. m (area)
Hr (time)
K.cal (heat)
°C (temperature)

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Heat and Mass Transfer
The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is

Greater than one
Less than one
Equal to one
Equal to Nusselt number

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Heat and Mass Transfer
Total emissivity of polished silver compared to black body is

Very much lower
Higher
More or less same
Same

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MORE MCQ ON Heat and Mass Transfer

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